Multiple events for Oprofile hangs entire machine, need to power boot

Hi,
On RedHat Linux, running on AMD chip I am trying to use mutiple events like,
sudo opcontrol -e L2_CACHE_MISS:50000 -e REQUEST_TO_L2:50000
and this hangs the entire machine.
What could be the cause? Using single event works fine without any problem.
Regards,
--
Shashikant Bhandari
301 528 6436 (H)
240 350 6639 (Cell)

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Hi,
On RedHat Linux, running on AMD chip I am trying to use mutiple events like,
sudo opcontrol -e L2_CACHE_MISS:50000 -e REQUEST_TO_L2:50000
and this hangs the entire machine.
What could be the cause? Using single event works fine without any problem.
Regards,
--
Shashikant Bhandari
301 528 6436 (H)
240 350 6639 (Cell)